In modern medicine, drug-induced skin reactions are called drug eruptions, analyzing the concepts of toxin and heat from Donguibogam in detail from an immunological perspective. Even if a medication is taken for therapeutic purposes, once it enters the body, the immune system may recognize it as a foreign substance or an antigen and overreact. This is like a security system mistaking an authorized visitor for an intruder, sounding an alarm and adopting an excessively forceful defensive stance.
Drug eruptions do not stop at simple pruritus or red spots; their spectrum is exceptionally diverse. The most common form, the maculopapular rash, often appears within one to two weeks after taking medication, starting as small red macules and raised papules on the trunk that spread to the limbs. Sudden pruritus accompanied by swelling resembling urticaria is also common.
However, it can occasionally trigger life-threatening reactions. There are severe conditions like Stevens-Johnson syndrome and toxic epidermal necrolysis, where the epidermis peels extensively and involves the mucosa. Other conditions, like drug reaction with eosinophilia and systemic symptoms, involve a rash accompanied by fever, lymph node enlargement, and internal organ damage to the liver or kidneys. These severe reactions can be understood as phenomena similar to a cytokine storm, where immune cells such as T cells react abnormally and hypersensitively to a specific drug, releasing massive amounts of inflammatory substances called cytokines.
What Donguibogam describes as stagnant heat and toxins can be explained in modern medicine as an inflammatory reaction and a hypersensitivity reaction. Problems may arise during the process of liver detoxification or kidney excretion after a drug component enters the body, or immune cells may perceive drug metabolites as danger signals and mount an excessive attack. In particular, aspirin, certain antibiotics such as penicillin and sulfonamides, nonsteroidal anti-inflammatory drugs, and anticonvulsants are well known as representative medications that frequently trigger drug eruptions. Therefore, it is critical to identify exactly which drug was taken before these symptoms appeared.
As such, a drug eruption is not merely a superficial skin issue, but is deeply connected to a systemic malfunction of the immune system. When a drug eruption is suspected, never self-diagnose or leave it untreated; it is crucial to consult a specialist to identify the causative drug and receive appropriate treatment. Please listen to the signs your body is sending.
